Your credit score is a 3 digit number (usually from 300 to 850) that represents how trustworthy you are. Based on your credit score, banks and lenders will decide if they want to give you a credit line or loan and what interest rate you can qualify for. The better your credit score is, the more money you could potentially save. A good credit score means you have a chance to get lower interest rates and it might be easier for you to get approved when renting an apartment, buying a car, and even buying your first home. A huge portion of your credit score is built through credit cards.